By Topic

Extremely Wide-band, Low-profile BOR-SPR Antenna

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
H. Nakano ; College of Engineering, Hosei University, Koganei, Tokyo, Japan 184-8584, ; K. Morishita ; J. Yamauchi

It is well known that a monopole antenna above a ground plane radiates an omni-directional beam around its axis. The height of this monopole can be reduced by using top-loading techniques. One such technique involves attaching a patch to the top of a monopole for use as a microwave antenna. In this case the structure is recognized as a low-profile, center-fed patch antenna. When the antenna height of this center-fed patch is extremely small, the reactance component of the input impedance is large and matching to a 50-ohm feed line is difficult. However, it has been found that this large reactance can be reduced by cutting a slot into the center-fed patch. This slotted patch constitutes two regions: an inner patch island and an outer conducting ring. It has also been found that, when the outer conducting ring is shorted to the ground plane with conducting pins, this structure (abbreviated as a PSP antenna, because the structure is patch with a slot and pins) has a wide bandwidth. Recently, a modified version of the PSP antenna structure has been reported, where the inner patch island above the ground plane is replaced with a conducting body of revolution (BOR). This new structure is designated as the BOR-SPR (BOR above a ground plane, surrounded by a shorted parasitic ring). So far, the VSWR of the BOR-SPR has been analyzed; however, the effect of the size of the ground plane on the radiation characteristics has yet to be revealed. This paper presents the input impedance (VSWR), radiation pattern, and gain of the BOR-SPR when the diameter of the ground plane is varied.

Published in:

Antenna Technology: Small Antennas and Novel Metamaterials, 2008. iWAT 2008. International Workshop on

Date of Conference:

4-6 March 2008